Air-cleaner for carbureters



A. C. BENNETT. MR CLEANER FOR CARBURETERS. APPLICAT|0N men JAN. 31. 19:5.

i f M k M R 6 S m i/ m S w w W 9 W406 A. C. BENNETT. AIR CLEANER FOR CARBURETERS.

APPLICATIQN FILED JAN- 31 Patented Mar. 23.19

20. 2 swans-sun 2.

ASHLEY C. BENNETT, F MINNEAPOLIS, MINNESOTA.

AIR-CLEANER FOR CA RIBURETERS,

' Specification of Let r Patented Mar. 23, 1920.

, V Application flied January 31, 1918. Serial No. 75,812.

To all whom it may concern:

Be it known that I, ASHLEY G. BENNrn'r, a citizen of the United States, residing at Minneapolis, in the countyof Hennepin and State of Minnesota, have invented certain .new and useful Improvements in Air- I Cleaners for Carbureters, of which the following is a specification.

My invention relates to air cleaners for carbureters and has for its object to provide means adapted to be connected with the intake pasageway of a carbureter embodying a vertical cylindrical casing having extending along the walls thereof a multiplicity of,

closed spiral passageways opening to outside air through the casing near the top thereof, and discharging into the casing at various points near the bottom thereof whereby the air is caused to whirl within the casing throwing the solid matter against the wall thereof. The particles of mineral matter, grit, etc.,- are thus projected out of the air currents and into the. dead air space, moving in a direction such as to permit gravity to carry such particles toward the bottom of the chamber, where they come to rest and accumulate and from whichsuch accumulation may from time to time be discharged. This arrangement is such that no matter what the accumulation of dirt may be within the chamber, under ordinary conditions of operation and inspection it can never have the effect of restricting the air admission passagewaysor. of interfering with the normal operation oi th e carbureter.

v V The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out inthe claims.

In the drawings, illustrating the operation of my invention in oneform,-*-

Figure 1 is a sectionalfelevation of a form of carbureter embodying .my invention. Figs. 2 and 3 aredetached detail views showing the means of forming the spiral air inlet passageways. Fig. 4 is a plan View on line 4-4 of Fig. 1=:looking upwardly. Fig. 5 is a sectional elevation view of a portion of acarbureter embodying a modified construction. Fig. 6 is a view on line 6--6 of Fig. 5 looking downwardly. Fig. 7 is a part-sectional elevation of a carbureter embodying another form of the invention. Fig. 8 is. a sectional plan view on line 8-8 of Fig. 7.

As illustrated and described, the carbureter 10 may be of any desired construction having a pipe 11 for connection'with the engine and an inlet pipe. 12 which is connected with the conical top 13 of a cylindrical casing 14; having connected therewith a depending conical portion 15. The part 15 is'provided with a lower mouth 16'wl1ich, in the form shown in Fig. 1, is closed by an ordinary screw cap 17. As shown 111 Fig. 5,

this is closed by a flanged cap 18 held in position by a bail-l9 that is pivotally connected with a neck 20 depending from conical portion 15. In the form shown in Fig. 7,the opening 16 is closed b a screw cap 21 having an enlarged glo'be-lilie receptacle 22.

As shown in Fig. 1, a pair of spiral members 23, of the general form disclosed in Fi s. 2 and 3, are soldered to the inside of cy indrical casing 14. These members are trough-like in character liaving one end closed by awall 24 and the other end open, as indicated at 25, so that, when the flanges .26 and 27 are soldered to the inside wall of jacent the closed upper end of passageway 28. Projecting caps 51 may, if desired, be secured'to the cylinder so as to project over openings 30 and prevent falling particles of dirt or water from entering said passageways,

The form of device shown in Fig. 5 is similar to that of Fig. 1 except thatthe air passages for admitting air into cylinder 14: are formed of oval-shaped tubular members '31 and 32 which extend through the wall of cylinder Hand have open months 33 and 34 outside of said cylinder and inwardly projected flanges 35 and 36 adjacent the lower discharge mouths, as clearly shown in Figs.

5 and 6.

In the modified form of Figs. 7 and 8, an inner cylinder 37 is soldered to the upper 'conical'portionl3 in parallel relation to cylinder 14, and this inner cylinder is divided by partitions 38 into a multiplicity of spiral passageways 39 each connected with the outside atmosphere by an aperture 40 through cylindrical casing 14. and discharging at .the ends of said partitions into a chamber formed by conical member 15 at the point of junction thereof with the cylindrical portion 14.

It will be apparent that the several modifications herein described are somewhat similar in their mode of operation and that in each case the air from the outside is introduced into the chamber 41 within the casing formed by easing portions 13, 14 and 15,

through spiral passageways which direct the air in currents turned downwardly and so as to circulate about the outer portionof said chamber. This produces a dead air space within chamber a1 into which all particles of dirt or dust will be pro1ected by reason of the momentum which such particles have at the time of entrance into the chamber. From this dead air space the dust and dirt will gravitate to the bottom of the chamber, whence it may be removed as desired by withdrawing the closure 17, 18 or 21.

The advantages of my invention will be obvious. By means of it all particles of dirt or solid impurities in the air are effectually removed before such air enters the carbureter. i

The means herein disclosed are highly efficient and satisfactory for securing the results and accomplishing the purposes of my invention, but it-is obvious that such means extending in contact'with said cylindrical portion and opening through the casing near the'top and discharging at a multiplicity of points within the casing near the bottom of said cylindrical portion, said easingembodying a downwardly extended sealed dead air dust collecting chamber.

2. An air cleaner comprising an inner cylindrical casing open at the bottom and connected at the top with an air-current inducing means, a second casing connected therewith and extending below the first named casing and forming a sealed dead air collecting chamber below the same, and a multi plicity of parallel air passages extending between said casings and opening to the-outside air through and near the top of the last named casing and discharging within the same near the bottom of the first named casing at a multiplicity of points, said passageways extending spirally from their intake point to their discharge point for causing the currents of admitted air to circulate above the dead air collecting-space.

, 3. An air cleaner comprising an inner casing open at the bottom. a second outer casing extending below the first named casing and forming a sealed dead air collecting hamber. a top closure for said casings provided with a discharge opening and a multiplicity of parallel air passages extending between said casings and opening to the outside air beneath and adjacent said top closure and discharging within said outer casing near the bottom of the first named casing at a multiplicity of points. said passageways extending spirally from their intake points to their discharge points for causing the currents of admitted air to circulate above the dead air collecting chamber.

In testimony whereof I afiix my signature in presence of two witnesses.

ASHLEY C. BENNETT WVitnesse's:

F. A. WHrmLEY, H. A. BOWMAN. 

